Sorry, that's not right.  A considerable amount of the blood plasma filters through the glomerulus into the nephron tubule. This results from the large amount of blood flow through the glomerulus, the large pores (40 Å) in the glomerular capillaries, and the hydrostatic pressure of the blood. The lipophilicity of the plasma is not a factor in glomerular filtration in that both lipophilic and hydrophilic substances can filter through the glomerulus.